Abstract A novel copper-catalyzed approach to benzils from readily available deoxybenzoins under neutral conditions using air as the oxidant has been developed. The reaction tolerates a variety of useful substituents including chloro, bromo, iodo, keto, ester, and cyano groups. A novel copper-catalyzed approach to benzils from readily available deoxybenzoins under neutral conditions using air as the
the visible light induced simple copper(II) chloride catalyzedoxidation of diarylacetylenes to α-diketones by molecular oxygen at roomtemperature. The in situ generated copper(II)-superoxo complex is a light-absorbing species that oxidizes inert diarylacetylenes to α-diketones. In contrast to reported photochemical processes, the current oxidation protocol does not require any exogenous photocatalyst
Mild Mn(OAc)<sub>3</sub>-Mediated Aerobic Oxidative Decarboxylative Coupling of Arylboronic Acids and Arylpropiolic Acids: Direct Access to Diaryl 1,2-Diketones
作者:Wen-Xin Lv、Yao-Fu Zeng、Shang-Shi Zhang、Qingjiang Li、Honggen Wang
DOI:10.1021/acs.orglett.5b01265
日期:2015.6.19
A simple and efficient method for the synthesis of diaryl 1,2-diketones has been developed. The reaction represents the first example of diaryl 1,2-diketones that are synthesized directly from arylboronic acids and arylpropiolicacids by a radical pathway in moderate to good yields. This reaction proceeds under mild reaction conditions and with good tolerance of a variety of functional groups. Preliminary
Silver‐catalyzed oxidative decarboxylative couplings of carboxylic acids and anhydrides to produce 1,2‐diketones and substituted ethanes were developed. This reaction allows the generation of acyl or alkyl radicals by decarboxylation of the corresponding α‐keto acids, alkyl acids and anhydrides, which are sequentially coupled to efficiently construct a new C−C bond. This reaction represents a carboxylic
Ruthenium-Catalyzed Oxidation of Alkenes at Room Temperature: A Practical and Concise Approach to α-Diketones
作者:Shulin Chen、Zhaojun Liu、Erbo Shi、Long Chen、Wei Wei、Hong Li、Yannan Cheng、Xiaobing Wan
DOI:10.1021/ol200716d
日期:2011.5.6
The catalytic oxidation of alkenes to α-diketones is unprecedented. A newoxidation of alkenes, catalyzed by a ruthenium complex, which allows an efficient route to α-diketones using TBHP as an oxidant is described. This methodology is highlyfunctional group tolerant, is practically convenient, requires no additional ligand, and operates under mild conditions with short reaction times. Based upon